发明名称 |
Closed loop power control for low earth orbit satellite communications system |
摘要 |
A satellite communication system (10) includes at least one satellite communication signal repeater (12); at least one ground station (18) for transmitting a feeder link comprised of a plurality of communication signals to the at least one satellite communication signal repeater; and a plurality of user terminals (13) each receiving one of the communication signals over a user link from the at least one satellite communication signal repeater. A method includes steps of measuring a quality of at least one reference signal received by the user terminal, via the satellite; transmitting the measured quality of the reference signal received by the user terminal to the ground station; comparing the measured quality with a predetermined reference; and adjusting a transmit power of the ground station in response to a difference between the predetermined reference and measured quality. The transmit power of the ground station is adjusted so that a flux density of a downlink beam is substantially constant at the user terminal independent of the location of the user terminal in the beam. <IMAGE> |
申请公布号 |
EP1098456(A2) |
申请公布日期 |
2001.05.09 |
申请号 |
EP20000309656 |
申请日期 |
2000.11.01 |
申请人 |
GLOBALSTAR L.P. |
发明人 |
WIEDEMAN, ROBERT A.;SITES, MICHAEL J. |
分类号 |
H04B7/15;H04B7/185 |
主分类号 |
H04B7/15 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|